we'll try at write a manual in wiki so everyone got this information.at start indeed the screen will have a gray tent.the ui2 was meant to use with a gyration mouse. it has 3 hard buttons that are associated with F6 F7 and F8 from normal keyboardwith F6 you can ff and rewind, pause jump to chapters in dvd's or play another entry from play listwith F7 you bring the main menuwith F8 you can change the light level and volume level.with F5 you hide/show the mouse